Where's Aminom when you need him?
You're right, that uck shouldn't be showing up, and just on an offchance, it might be worth checking out if any other program exporters do it. Try exporting the same object in sculptypaint, or maybe wings3d, rokuro, milkshape, any of the other cheapie/freebie sculpt tools. It could just be blender.
But it could also be a very misplaced and unnecessary "smoothing" effect caused by the actual act of exporting it into a texture, which would be irritating and the only way to fix it would be to do the texture over in photoshop at a larger resolution, like the aforementioned Mr Wizkid Aminom does
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